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  #1  
Old 01-29-2020, 02:50 PM
tomintexas tomintexas is offline
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.22 lr ammo velocity

Have had a Chrony for a number of years. Yesterday for some reason I thought it would be fun to chronograph some .22 lr. All ammo tested had advertised velocity of over 1200 FPS.
Using a Nelson conversion pistol, I shot several different brands All came in between 1000 and 1100.
Why the discrepancy?
1) Chrony error?
2) False advertising?
3) Difference in barrel length between pistol and test barrel?

Thanks for your input
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  #2  
Old 01-29-2020, 07:15 PM
Goldstar225 Goldstar225 is offline
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Difference in barrel length. The advertised velocities are probably based on being shot from a rifle barrel. Handgun velocities are naturally going to be lower.
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  #3  
Old 01-29-2020, 07:29 PM
jjfitch jjfitch is offline
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Smile This...

Quote:
Originally Posted by Goldstar225 View Post
Difference in barrel length. The advertised velocities are probably based on being shot from a rifle barrel. Handgun velocities are naturally going to be lower.
In general advertised velocity will be for rifle and pistol velocities will be around 100 FPS less. If it's sold a Match Pistol it will be close to advertised velocity.

Do a google search, there were tests done several years ago for accuracy in premium target pistols and included velocity. One of the "take away's" for me was how well CCI Standard Velocity did against ammo costing 2x, 3x, 4x, 5x as much! Which pretty much was what I found as well.

If you can't find the link I'll see if I can find it.

All the best in 2020,
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Gun Control: Acquire target, align sights, press trigger, only after you have identified your target and what is beyond it and made the decision to shoot!

Last edited by jjfitch; 01-29-2020 at 08:40 PM.
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  #4  
Old 01-29-2020, 07:43 PM
tomintexas tomintexas is offline
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I thought this could be the culprit. I will confirm when we get another warm spell. I will check pistol vs Browning lever action and report findings back. Thanks guys.
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  #5  
Old 01-31-2020, 09:10 AM
tomintexas tomintexas is offline
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Got a chance to chronograph some more .22 lr yesterday. I used 3 different brands and shot them from a Nelson 1911 conversion on a Colt Gold cup frame and from a Browning BL22 rifle. I shot 5 shots from both guns with each brand.
Results were pretty uniform between brands with all pistol rounds in the 1030-1050 FPS range and the rifle rounds in the 1180-1200 FPS range. The Nelson barrel 5” and the rifle is approx. 18”.
In summary, I have answered my own question; Barrel length does impact bullet velocity It is still not known what barrel length the different manufacturers used to test their ammo, however their published data does appear reasonable.
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  #6  
Old 01-31-2020, 11:40 AM
jjfitch jjfitch is offline
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There were some tests run a few years ago where they actually cut the barrel as they were testing velocities. They recorded velocities as the cut 1" at a time. Interesting data but not earth shattering. It just made sense!

A google search might lead you to this info!

Smiles.
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Gun Control: Acquire target, align sights, press trigger, only after you have identified your target and what is beyond it and made the decision to shoot!
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  #7  
Old 01-31-2020, 03:39 PM
tomintexas tomintexas is offline
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I saw that test. I wasn’t quite ready to sacrifice my BL-22. LOL
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  #8  
Old 02-09-2020, 06:08 AM
pocketshaver pocketshaver is offline
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severe changes have occurred since 1990. For example the drop has doubled
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  #9  
Old 02-09-2020, 10:51 AM
jjfitch jjfitch is offline
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The tests are already done!!

Quote:
Originally Posted by tomintexas View Post
I saw that test. I wasn’t quite ready to sacrifice my BL-22. LOL
Since these tests are already done, it's not necessary to sacrifice your barrel!

The tests were pretty revealing especially how well CCI-SV performed.

Smiles,
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John, Retired LEO, CA POST Certified Firearms Instructor, NRA Endmt., NRA Instructor, NRA RSO, Blue Lives Matter
Gun Control: Acquire target, align sights, press trigger, only after you have identified your target and what is beyond it and made the decision to shoot!
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  #10  
Old 02-09-2020, 01:13 PM
USMM guy USMM guy is offline
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If you plan to chronograph some .22 rimfire.

Check some Aguila Super Extra. There is a small family owned slaughterhouse not that far from me. They put down their animals with a .22 to the back of the head. They told me one day that Aguila Super extra was what they used as it was the only round that they tried that would consistently penetrate the skull of a cow and put it down with authority.
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